<template>

  <div class="demo-image">

    <el-upload
      class="avatar-uploader"
      action="https://jsonplaceholder.typicode.com/posts/"
      :show-file-list="false"
      :on-success="handleAvatarSuccess"
      :before-upload="beforeAvatarUpload">
      <img v-if="imageUrl" :src="imageUrl" class="avatar">
      <i v-else class="el-icon-plus avatar-uploader-icon"></i>
    </el-upload>

    <el-image
      style="width: 100px; height: 100px"
      :src.sync="dataurl"
      :preview-src-list="srcList">
    </el-image>
  </div>

</template>


<style>
.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.avatar-uploader .el-upload:hover {
  border-color: #409EFF;
}

.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  line-height: 178px;
  text-align: center;
}

.avatar {
  width: 178px;
  height: 178px;
  display: block;
}
</style>

<script>
import {compress,fileToDateurl} from '@/assets/js/imgCompression'

export default {
  data() {
    return {
      imageUrl: '',
      dataurl: '',
      srcList: ['','']
    };
  },
  methods: {
    handleAvatarSuccess(res, file) {
      this.imageUrl = URL.createObjectURL(file.raw);
    },
    beforeAvatarUpload(file) {
      let that = this;
      fileToDateurl(file, function (du) {
        that.dataurl = du;
        that.srcList[0] = du;
      })
      compress(file, function (file1) {
        fileToDateurl(file1, function (du) {
          that.srcList[1] = du;
        })
      })
    }

  }
}
</script>
